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e83f13c04e
Reviewed-By: Yonggang Luo <luoyonggang@gmail.com> Reviewed-by: Jesse Natalie <jenatali@microsoft.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16908>
89 lines
2.7 KiB
C
89 lines
2.7 KiB
C
/**************************************************************************
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*
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* Copyright 2007-2013 VMware, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#include "no_extern_c.h"
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#ifndef _C99_COMPAT_H_
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#define _C99_COMPAT_H_
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/*
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* MSVC hacks.
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*/
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#if defined(_MSC_VER)
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# if _MSC_VER < 1900
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# error "Microsoft Visual Studio 2015 or higher required"
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# endif
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/*
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* XXX: MSVC has a `__restrict` keyword, but it also has a
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* `__declspec(restrict)` modifier, so it is impossible to define a
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* `restrict` macro without interfering with the latter. Furthermore the
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* MSVC standard library uses __declspec(restrict) under the _CRTRESTRICT
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* macro. For now resolve this issue by redefining _CRTRESTRICT, but going
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* forward we should probably should stop using restrict, especially
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* considering that our code does not obbey strict aliasing rules any way.
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*/
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# include <crtdefs.h>
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# undef _CRTRESTRICT
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# define _CRTRESTRICT
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#endif
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/*
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* C99 restrict keyword
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*
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* See also:
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* - http://cellperformance.beyond3d.com/articles/2006/05/demystifying-the-restrict-keyword.html
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*/
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#ifndef restrict
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# ifndef __cplusplus
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/* Use C99 restrict keyword */
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# elif defined(__GNUC__)
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# define restrict __restrict__
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# elif defined(_MSC_VER)
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# define restrict __restrict
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# else
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# define restrict /* */
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# endif
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#endif
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/* Simple test case for debugging */
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#if 0
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static inline const char *
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test_c99_compat_h(const void * restrict a,
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const void * restrict b)
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{
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return __func__;
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}
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#endif
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#endif /* _C99_COMPAT_H_ */
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